nyscience - 5. Energy and matter interact through forces that result in changes in motion.

MAJOR UNDERSTANDINGS
5.1a The position of an object can be described by locating it relative to another object or the background (e.g., on top of, next to, over, under, etc.).
5.1b The position or direction of motion of an object can be changed by pushing or pulling.
5.1c The force of gravity pulls objects toward the center of Earth.
5.1dThe amount of change in the motion of an object is affected by friction.
5.1e Magnetism is a force that may attract or repel certain materials.
5.1f Mechanical energy may cause change in motion through the application of force and through the use of simple machines such as pulleys, levers, and inclined planes.
5.2a The forces of gravity and magnetism can affect objects through gases, liquids, and solids.
5.2b The force of magnetism on objects decreases as distance increases